The index on the block filters is running in the background on the validation interface. To avoid intermittent test failures, it needs to be synced.
This concludes backport of [[https://github.com/bitcoin/bitcoin/pull/22311 | core#22311]]
https://github.com/bitcoin/bitcoin/pull/22311/commits/fadddd13eef4428f5fa7237583d4be41a9335cd9
Depends on D11445