5.32 pre 5 x64
these tempo markers are added automatically if a user does the following:
1- create 2 tempo markers, one gradually moving to the next
2- click to move the edit cursor to a middle position between these two
3- click the tempo parameter, but do not change it
4- BUG: an unnecessary tempo marker is automatically added at this position.
5- NOTE: this new tempo marker does NOT have the "gradual" parameter ticked, which breaks your tempo change.