Sorry, it was an issue with my settings. Please disregard it.

[xkia]

In Vim mode, entering 'ga' inserts the character 'syAlign)' at the current configuration. Currently, the action mapped to 'ga' is set as follows: noremap ga <ESC>:action AceWordAction<CR>. Even if this mapping is commented out, it still inserts the character 'syAlign)' at the current position.

[xkia]

Sorry, it was an issue with my settings. Please disregard it.

[lippfi]

Offtopic:
It's strongly recommended to use the action notation in mappings e.g.
noremap ga <Action>(AceWordAction)
it is faster, more consistent and safe (this mapping does not open ex input prompt in the bottom of the editor and calls the IDE action directly)