Flaky tilemap tests

[stacey-gammon]

Another flaky test:

chart_should show correct tile map data on default zoom level.png"
>> FAIL: chrome on any platform - kibana - visualize app - visualize app - tile map chart - should show correct tile map data on default zoom level (5461ms)
Error: expected [ '14,004' ] to sort of equal [ '9 5,787 { "lat": 37.22448418632405, "lon": -103.01935195013255 }',
  'd 5,600 { "lat": 37.44271478370398, "lon": -81.72692197253595 }',
  'c 1,319 { "lat": 47.72720855392425, "lon": -109.84745063951028 }',
  'b 999 { "lat": 62.04130042948433, "lon": -155.28087269195967 }',
  'f 187 { "lat": 45.656166475784175, "lon": -82.45831044201545 }',
  '8 108 { "lat": 18.85260305600241, "lon": -156.5148810390383 }' ]

  [
E   0: "9 5,787 { \"lat\": 37.22448418632405, \"lon\": -103.01935195013255 }",
E   1: "d 5,600 { \"lat\": 37.44271478370398, \"lon\": -81.72692197253595 }",
E   2: "c 1,319 { \"lat\": 47.72720855392425, \"lon\": -109.84745063951028 }",
E   3: "b 999 { \"lat\": 62.04130042948433, \"lon\": -155.28087269195967 }",
E   4: "f 187 { \"lat\": 45.656166475784175, \"lon\": -82.45831044201545 }",
E   5: "8 108 { \"lat\": 18.85260305600241, \"lon\": -156.5148810390383 }",
E   length: 6
A   0: "14,004",
A   length: 1

Possibly related: #11040

cc @archanid @thomasneirynck

[thomasneirynck]

duplicate: #11101.