more robust fix for flyby timer issue #17669

Job	Run time
Compile Maps	1m 30s
Find Maps to Test	13s
Run Linters	1m 38s
Windows Build	1m 51s
Alternate Tests (515, 1610, lv624) / run_unit_tests	6m 7s
Unit Tests (bigredv2) / run_unit_tests	6m 24s
Unit Tests (chinook) / run_unit_tests	6m 20s
Unit Tests (almayer) / run_unit_tests	7m 23s
Unit Tests (corsat) / run_unit_tests	6m 16s
Unit Tests (desert_dam) / run_unit_tests	6m 20s
Unit Tests (fiorina_sciannex) / run_unit_tests	6m 25s
Unit Tests (kutjevo) / run_unit_tests	6m 23s
Unit Tests (lv624) / run_unit_tests	6m 30s
Unit Tests (lv522_chances_claim) / run_unit_tests	6m 17s
Unit Tests (ice_colony_v2) / run_unit_tests	6m 18s
Unit Tests (new_varadero) / run_unit_tests	6m 43s
Unit Tests (prison_station_fop) / run_unit_tests	6m 10s
Unit Tests (runtime) / run_unit_tests	6m 18s
Unit Tests (shivas_snowball) / run_unit_tests	6m 46s
Unit Tests (sorokyne_strata) / run_unit_tests	6m 22s
Unit Tests (whiskey_outpost_v2) / run_unit_tests	6m 42s
Check Alternate Tests	2s
	1h 54m 58s

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