Why can I sometimes not adjust clip gain?

Ok riddle me this: sometimes, but not all the time, when I try to raise or lower the gain for an entire clip using clip gain envelopes, nothing wants to happen.

1. I select the clip
2. I set the track edit filter to clip envelopes=>gain
3. I hover the mouse on the upper middle portion of the clip to get the "adjust selection range" icon or whatever it's called
4. I drag the mouse down (or up) and nothing wants to move

Most of the time it works but sometimes it doesn't. If it doesn't, simply trying again doesn't solve it, though most of the time I can still manually create nodes and adjust those. It's a major PITA and I can't figure it out. The clip isn't locked btw.

Sanderxpander
Any other suggestions or clever ideas are welcome in the mean time!

 
EDIT: not even sure why I bother

Oh, except for when I've got the dropdown set for another envelope.
 
Two times.  The only TWO TIMES I've ever had that happen...  

WD40 is my go to always

I'll wait till it happens again and try that, thanks.

Any other suggestions or clever ideas are welcome in the mean time!

I just realized that you want to adjust the envelope for the entire clip...  I should pay more attention.
Along with using the 'MOVE' cursor option, you have highlighted the clip right?  I have to do that to move the envelope as a whole.

Yep. I know how to do it, or I think I do. I've even watched a tutorial a long time ago and I do it a lot (with the smart tool). Just sometimes, for no reason I can discern, it won't work. Use case: leveling short clips while comping from different takes.

I know with Track Envelopes you need to hold down the control key when moving an envelope or a section thereof.
 
Could this be the same with Clip Envelopes?

Watching this thread. I have this problem intermittently, mostly using the smart tool, and have never been able to pin down the cause.
 

Bristol_Jonesey
I know with Track Envelopes you need to hold down the control key when moving an envelope or a section thereof.
 
Could this be the same with Clip Envelopes?

That's right. If you want to move the whole clip envelope up or down (as opposed to adding nodes, etc.) you hold ctrl and drag up or down.

The clip does not need to be highlighted.

Sanderxpander
I definitely do not need to use CTRL. I would need to use CTRL if I were to "grab" the line and drag it up or down. However what I'm doing uses the line moving cursor you get when you hover near the top of the clip. You don't use CTRL for that, in fact if you do it moves the entire envelope except the end point of a clip, which I guess could be useful but is a different effect altogether.

That is correct!  The Ctrl key is only needed when the Edit Filter is set to Clips.
 
When the Edit Filter is set to Clip Gain, the Smart Tool cursor changes to a double-headed vertical arrow with a horizontal "I" beam when the cursor is in the upper 1/3 of the clip.  You only have to drag it up or down.
 
I was testing to see if I could reproduce the problem and it happened to me one time in about 10 minutes of testing.  I tried adding the Ctrl key since it had been mentioned, but the envelope still would not move.  Unfortunately, I could not find a recipe that would reliably cause the problem.
 
This doesn't really help your situation, but just adds confirmation of your experience.
 
-- Ron