suspected bug when Equalization used after Envelope Mod

​​Might be a bug? (Audacity 2.1.1, Windows 10, Thinkpad T410i)

Working on an audio compilation, I edited the envelope of a song to correct
volume changes (by changing the cursor to the envelope tool).  Plays fine.
Then I reset the cursor to the normal locate tool.  I have saved this song
at this point.

Whenever I try to adjust the Equalization on this song, the envelope
corrections disappear!  It's robust - survives saving, rebooting,
reloading.  Other modifications (e.g. Amplitude, or Echo) work normally,
leaving the envelope mods intact.

This has not occurred before.

I have attached the .aup file.  Don't know how to send you the .data file?
Audacity has not crashed, so no .zip file.

Tony Carr

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