(Classic) Are there bugs with +healing and +healing talents?

I just respecced last night and had a ton more healing power than I previously had and I can’t figure out why. I thought it was my addon incorrectly figuring the stats because adding my +healing from gear in addition to the extra healing from Spirit should have put me at 355 where I was before, but after respec I was at 534.

Here’s my old spec - https://classic.wowhead.com/talent-calc/priest/5012301305001-205051031300055

Here’s my new one - https://classic.wowhead.com/talent-calc/priest/5001321335021-23515100030005

I assumed this was an issue with DejaClassicStats but do you think it’s a bug with talents?

It was mentioned to me that the below issue existed and was fixed recently however I don’t believe this affects me with my current gear and I can’t see how a talent respec would suddenly trigger this fix anyway.