Yes, this can happen with expired domains. Sometimes the early growth comes from existing authority, but later Google re evaluates the new content and signals.
from my own experience an expired website domain is good for the beginning stages but will not continue to grow simply bcz of hiistory alone. once the first boost is over search engines appear to measure ur website according to its present worth. i would make sure that u have enough new content that ur back links are still valid nd whether the new pages are satisfyinng the same search intent.
Expired domains can help you start faster, but they are not a guarantee. Building fresh authority is still important for stable rankings.
it has come to my attention that expired domains usually do pretty well when they are initially introduced due to the trust nd history that comes along with them. however once the momentum dies down the real test begins. in such cases i would examiine whether the previous authority was really pertineent whether the content strategy matched the audience nd whether new signals were being developed apart from the old ones.
Expired Domain's can give you a head start, but they still need ongoing work. I'd audit for toxic or disappearing backlink's, Improve internal linking, and keep adding quality content before expecting more Growth.