Hi,
It looks like the block 2630586 is the issue
zcashd@node:~$ curl --user xxx--data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getblock", "params": ["2630585"] }' -H 'content-type: text/plain;' http://xxx:28233 | jq '.result.valuePools[0].chainValue'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 4983 100 4902 100 81 1245k 21082 --:--:-- --:--:-- --:--:-- 1622k
13989930.17876866
zcashd@node:~$ curl --user rxxx --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "getblock", "params": ["2630586"] }' -H 'content-type: text/plain;' http://xx:28233 | jq '.result.valuePools[0].chainValue'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 4825 100 4744 100 81 194k 3406 --:--:-- --:--:-- --:--:-- 204k