Default value of EPHEMERAL column written by materialized view instead of actual value

[qoega]

CREATE TABLE raw
(
  name String,
  ts String
) ENGINE = MergeTree
ORDER BY (name, ts);

CREATE TABLE parsed
(
  name String,
  ts_ephemeral Nullable(DateTime64(9)), -- no EPHEMERAL
  ts DateTime64(9, 'UTC') MATERIALIZED if(ts_ephemeral IS NULL, date(0), ts_ephemeral),
) ENGINE = MergeTree 
ORDER BY (name, ts);

CREATE TABLE parsed_eph
(
  name String,
  ts_ephemeral Nullable(DateTime64(9)) EPHEMERAL, -- with EPHEMERAL
  ts DateTime64(9, 'UTC') MATERIALIZED if(ts_ephemeral IS NULL, date(0), ts_ephemeral),
) ENGINE = MergeTree 
ORDER BY (name, ts);

CREATE MATERIALIZED VIEW parse_mv_eph
TO parsed_eph
AS
SELECT
  name,
  toDateTime64OrNull(ts, 9 ,'UTC') as ts_ephemeral
FROM raw;

CREATE MATERIALIZED VIEW parse_mv
TO parsed
AS
SELECT
  name,
  toDateTime64OrNull(ts, 9 ,'UTC') as ts_ephemeral
FROM raw;

INSERT INTO raw VALUES ('abc', '1451611580')

SELECT 'input_parsed';
SELECT
  name,
  toDateTime64OrNull(ts, 9 ,'UTC') as ts_ephemeral
FROM raw;

SELECT 'parsed';
SELECT name, ts FROM parsed;

SELECT 'parsed_eph';
SELECT name, ts FROM parsed_eph;

input_parsed
abc	2016-01-01 01:26:20.000000000
parsed
abc	2016-01-01 01:26:20.000000000
parsed_eph
abc	1970-01-01 00:00:00.000000000

https://fiddle.clickhouse.com/0f10a874-8f3f-464a-a21a-5bf39d8d786a