Liteserver crashed with -400 code

[restoreall]

Hi all, I have a question about testnet.

When I use get_transactions on testnet, it usually returns -400 code for me. But when I remove the specific node and use different trans_lt to go on, other node also may throws -400. So how to resolve this problem?

Update:
Now im trying set only_archieve to true and it seems no error returned, so can i think that archieve_peer contains all data? or I have a wrong thinking?

pytoniq/pytoniq/liteclient/balancer.py

Line 234 in a5f1d15

only_archive = kwargs.pop('only_archive', False)

Thanks for everyone's answer.