A user has this issue of the extension stuck at Inserting TX # 512 of 1181:

It's failing on getting transactions by addresses in bulk: https://hsd-dev.org/api-docs/?shell--curl#get-tx-by-addresses
The request payload is too large (HTTP 413 response). In this case, the 240 kB request that failed contains 100 addresses. The next ones even more.
The extension will mostly have to break it into multiple smaller requests.

A user has this issue of the extension stuck at Inserting TX # 512 of 1181:

It's failing on getting transactions by addresses in bulk: https://hsd-dev.org/api-docs/?shell--curl#get-tx-by-addresses
The request payload is too large (HTTP 413 response). In this case, the 240 kB request that failed contains 100 addresses. The next ones even more.
The extension will mostly have to break it into multiple smaller requests.