Hello,
It’s unlikely that the responses are being cached on the client side, since the correct no-cache headers are set in the JSON-API responses.
It sounds as if the JSON-API responses are being cached on the server-side. Did you check your cache or caches? You should be excluding all queries that have the GET parameters __wallets_action and __wallets_exchange_action from your caching plugins. All server-side caching plugins have black lists or exclusion lists. Some “optimization” plugins also do page caching.
(This issue will be resolved once and for all with the upcoming release, where the JSON-API is replaced with WP REST APIs.)
Hope you have a great 2022! Let me know if you can’t resolve this issue.
with regards