>>5906
I may have told you about it but I didn't post any photos. Not sure if I have any?

But yeah, it mostly happens after an extreme summer drought. The trees lose most of their leaves and then produce new growth when autumn rainfall sets in. I think it was 2 years ago when we had flowering apples and quince in September. It's not a good sign meaning the trees suffer from extreme stress. The same happens with horse chestnuts which all suffer from leaf-mining moths here so the leaves are damaged and turn brown in late summer. Severely affected trees lose all their leaves and produce new growth and lots of flowers in fall, which ofc weakens them further.
https://en.wikipedia.org/wiki/Cameraria_ohridella