diff --git a/DESCRIPTION b/DESCRIPTION
index 6d93882df..d9196b2a0 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Type: Package
 Package: sdmTMB
 Title: Spatial and Spatiotemporal SPDE-Based GLMMs with 'TMB'
-Version: 0.4.3.9001
+Version: 0.4.3.9002
 Authors@R: c(
     person(c("Sean", "C."), "Anderson", , "sean@seananderson.ca",
            role = c("aut", "cre"),
diff --git a/NEWS.md b/NEWS.md
index b27cb6730..ad867864c 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,11 @@
 # sdmTMB (development version)
 
+* Detect possible issue with factor(time) in formula if same column name is used
+  for `time` and `extra_time` is specified. #320
+
+* Improve `sanity()` check output when there are NA fixed effect standard
+  errors.
+
 * Set `intern = FALSE` within index bias correction, which seems to be
   considerably faster when testing with most models.
 
diff --git a/R/check.R b/R/check.R
index 566fe5649..0317e8ec2 100644
--- a/R/check.R
+++ b/R/check.R
@@ -112,14 +112,19 @@ sanity <- function(object, big_sd_log10 = 2, gradient_thresh = 0.001, silent = F
 
   obj <- object$tmb_obj
   random <- unique(names(obj$env$par[obj$env$random]))
-  s <- summary(object$sd_report)
-  se <- s[, "Std. Error"]
-  fixed_se <- !names(se) %in% random
-  se <- se[fixed_se]
-  np <- names(se)
+
+  pl <- as.list(object$sd_report, "Estimate")
+  ple <- as.list(object$sd_report, "Std. Error")
+  pars <- names(object$model$par)
+  pl <- pl[pars]
+  ple <- ple[pars]
+  np <- names(ple)
+  if (is_delta(object)) {
+    ple$ln_phi[1] <- 0 # don't flag NA, not estimated
+  }
   se_na_ok <- TRUE
-  for (i in seq_along(se)) {
-    if (is.na(se[i])) {
+  for (i in seq_along(ple)) {
+    if (any(is.na(ple[i]))) {
       if (!silent) cli::cli_alert_danger(c("`", np[i], paste0("` standard error is NA")))
       par_message(np[i])
       if (!silent) {
diff --git a/R/fit.R b/R/fit.R
index 5fef87134..07481d9ee 100644
--- a/R/fit.R
+++ b/R/fit.R
@@ -711,6 +711,13 @@ sdmTMB <- function(
       msg = "Specified `time` column is missing from `data`.")
     assert_that(sum(is.na(as.numeric(data[[time]]))) == 0L,
       msg = "Specified `time` column can't be coerced to a numeric value or contains NAs. Please remove any NAs in the time column.")
+    if (!is.null(extra_time)) { #320 protect against factor(time), extra_time clash
+      if (!is.list(formula)) .form <- list(formula)
+      x <- unlist(lapply(list(formula), \(x) attr(stats::terms(x), "term.labels")))
+      xf <- x[grep("factor\\(", x)]
+      if (any(c(grep(time, xf), grep(paste0("^", time, "$"), x))))
+        cli::cli_warn("Detected potential formula-time column clash. E.g., assuming 'year' is your time column: `formula = ... + factor(year)` combined with `time = 'year'`, and 'extra_time' specified. This can produce a non-identiable model because extra factor levels for the missing time slices will be created. To avoid this, rename your factor time column used in your formula. E.g. create a new column 'year_factor' in your data and use that in the formula. See issue https://github.com/pbs-assess/sdmTMB/issues/320.")
+    }
   }
   if (is.null(time)) {
     time <- "_sdmTMB_time"
diff --git a/src/sdmTMB.cpp b/src/sdmTMB.cpp
index ca454bbbb..1940e55db 100644
--- a/src/sdmTMB.cpp
+++ b/src/sdmTMB.cpp
@@ -1,4 +1,5 @@
 #define TMB_LIB_INIT R_init_sdmTMB
+#define EIGEN_DONT_PARALLELIZE
 #include <TMB.hpp>
 #include "utils.h"
 // #include <omp.h>
diff --git a/tests/testthat/test-2-print-anisotropy.R b/tests/testthat/test-2-print-anisotropy.R
index b55b5f1d7..50a29a447 100644
--- a/tests/testthat/test-2-print-anisotropy.R
+++ b/tests/testthat/test-2-print-anisotropy.R
@@ -12,8 +12,8 @@ test_that("Print anisotropy prints correctly", {
   )
 
   expect_output(print(fit1), regexp = "range: 33.23")
-  expect_null(plot_anisotropy(fit1))
-  expect_null(plot_anisotropy2(fit1))
+  # expect_null(plot_anisotropy(fit1))
+  # expect_null(plot_anisotropy2(fit1))
 
   # -------------------
   # Anisotropy with spatial only
diff --git a/tests/testthat/test-extra-time.R b/tests/testthat/test-extra-time.R
index 37c8e51e8..c0cb09801 100644
--- a/tests/testthat/test-extra-time.R
+++ b/tests/testthat/test-extra-time.R
@@ -176,3 +176,29 @@ test_that("extra time does not affect estimation (without time series estimation
   )
   expect_equal(m$model$par, m1$model$par)
 })
+
+test_that("factor year extra time clash is detected and warned about", {
+  skip_on_cran()
+  skip_on_ci()
+  mesh <- make_mesh(pcod_2011, c("X", "Y"), cutoff = 20)
+  expect_warning({fit <- sdmTMB(
+    density ~ 0 + as.factor(year),
+    time = "year", extra_time = 2030, do_fit = FALSE,
+    data = pcod_2011, mesh = mesh,
+    family = tweedie(link = "log")
+  )}, regexp = "rename")
+  pcod_2011$year_f <- factor(pcod_2011$year)
+  expect_warning({fit <- sdmTMB(
+    density ~ 0 + year_f,
+    time = "year_f", do_fit = FALSE, extra_time = factor(2030),
+    data = pcod_2011, mesh = mesh,
+    family = tweedie(link = "log")
+  )})
+  pcod_2011$year_f2 <- pcod_2011$year_f
+  fit <- sdmTMB(
+    density ~ 0 + year_f,
+    time = "year_f2", do_fit = FALSE, extra_time = factor(2030),
+    data = pcod_2011, mesh = mesh,
+    family = tweedie(link = "log")
+  )
+})