On this post you received a Hive SBI upvote of 0.114, indicating a pending balance of 0.342. Since your prior upvote of 0.17 brought your pending balance from 0.51 to 0.34, and this was only half an hour later, this is expected behavior.
Hive SBI operates on a 2.4 hour pending balance accrual cycle, so it was either 0 or 1 rounds of accrual in between posts.

After this post, your pending balance was 0.228