Some heights are stuck during performance tests

[ayrat555]

While working on #1600 [https://github.com//pull/1691], I discovered that some heights from watcher's status_get api are stuck.

At some point during byzantine events performance tests in the perf project, they just stop changing their values. The services are "block_getter" , "exit_finalizer" and "ife_exit_finalizer"

https://github.com/omgnetwork/elixir-omg/pull/1691/files/39e88c2a0520259a6e838c64be4d6520d4c53f88#diff-8b83b2d34d1f02fbd3a5539b4be04ce1R280

Locally everything works fine, only ci is affected.