Screen Off Device Administrator forcibly latching to hardware Search button? - Greenify

I can't seem to find any sort of way to turn this action off, as it makes my hardware search button unusable for anything else.
for a while I thought I had an issue with the ROM on my phone and this button, but it seems it was Greenify all along. I've been using it since August and must have activated said device administrator down the line.
so, I went in on a similar phone and found that it was Greenify doing it all along.
Now, when I long-press the Search button on either phone, it brings the notification up asking if it can be allowed, and I do not want this.
this is a Motorola Droid 4 and a Motorola Droid Razr MAXX that this is both happening on, running LineageOS 14.1. as I see it, these are among the oldest phones able to run 14.1, but all the more need to run Greenify for screen-off battery savings, especially since these are low-RAM devices (1GB, 838MB of which is able to be utilized).
with Greenify installed, the search button is unmappable in the system settings; Greenify takes it over and never lets go. it also prevents from anything being mapped for short press as well; it becomes a dead button able to do nothing except sleep the phone if the device administrator for Greenify is active and a "hey, do you want to activate it?" nag button otherwise if the button is long-pressed or accidentally long-pressed. this is release, not beta.

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Sudosftw said:
Now, when I long-press the Search button on either phone, it brings the notification up asking if it can be allowed, and I do not want this.
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with Greenify installed, the search button is unmappable in the system settings; Greenify takes it over and never lets go. it also prevents from anything being mapped for short press as well; it becomes a dead button able to do nothing except sleep the phone if the device administrator for Greenify is active and a "hey, do you want to activate it?" nag button otherwise if the button is long-pressed or accidentally long-pressed. this is release, not beta.
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This is still happening even after the recent update. This is annoying and I do not like it that Greenify is forcibly latching it onto a hardware button that I'd like to use for other things.
I would understand if this was a Bixby button thing for newer Samsung phones, but this is not a samsung phone.

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What if you go to Android Settings > Apps > cog wheel > Assist & voice input, under Assist app, does it say Greenify? If yes, try changing it to None.
Edit: Okay I just found out I can add a search button to the on screen navigation bar (am also on LineageOS 14.1). And indeed, long pressing it turns off the screen and hibernates any apps pending hibernation.
This while Settings > Long-press action on nav-bar is unchecked and Assist app is set to None. Then again, I now realize these settings are all about the home button, and you were talking about the search button. So I'm afraid all I can do is confirm the behaviour you described. I'm using the latest version from Play Store, v3.9.9.1.
I don't have a Screen Off Device Administrator though, but my device is rooted. Also,
with Greenify installed, the search button is unmappable in the system settings
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I don't have an option in Android Settings > Buttons to remap the search button, do you? Might be device specific (I don't have one of the phones you mentioned, nor a hardware search button).