Unreliable 'git rebase --onto'

Hello Git community,

Below is a simple reproduction scenario for what looks to be a bug (?)
in 'git rebase --onto' (v2.25.0-rc1-19-g042ed3e048af).

I would appreciate your confirmation of the misbehavior.
If the behavior is correct/expected, I would appreciate some feedback
how to avoid it in future, since it occurs with the default parameters.

1. git clone https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

2. ### Cherry pick an upstream commit, to contrast the results with
   'git rebase --onto':
   $ git checkout -b v4.18-cherry-pick v4.18
   $ git cherry-pick 463fa44eec2fef50
   Auto-merging drivers/input/touchscreen/atmel_mxt_ts.c
   warning: inexact rename detection was skipped due to too many files.
   warning: you may want to set your merge.renamelimit variable to at least 7216 and retry the command.
   [v4.18-cherry-pick bd142b45bf3a] Input: atmel_mxt_ts - disable IRQ across suspend
    Author: Evan Green [off-list ref]
    Date: Wed Oct 2 14:00:21 2019 -0700
    1 file changed, 4 insertions(+)

3. ### In spite of the warning, the result matches the original commit:
   $ vimdiff <(git show 463fa44eec2fef50) <(git show v4.18-cherry-pick)

4. ### Now, backport the same commit via 'git rebase --onto'
   $ git rebase --onto v4.18 463fa44eec2fef50~ 463fa44eec2fef50
   First, rewinding head to replay your work on top of it...
   Applying: Input: atmel_mxt_ts - disable IRQ across suspend

5. ### The result is different:
   $ git branch v4.18-rebase-onto
   $ git diff v4.18-cherry-pick v4.18-rebase-onto

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index b45958e89cc5..2345b587662b 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c

@@ -3139,8 +3139,6 @@ static int __maybe_unused mxt_suspend(struct device *dev)
 
 	mutex_unlock(&input_dev->mutex);
 
-	disable_irq(data->irq);
-
 	return 0;
 }
 

@@ -3162,6 +3160,8 @@ static int __maybe_unused mxt_resume(struct device *dev)
 
 	mutex_unlock(&input_dev->mutex);
 
+	disable_irq(data->irq);
+
 	return 0;
 }

In a nutshell, purely from user's perspective:
 - I get a warning from 'git cherry pick', with perfect results
 - I get no warning from 'git rebase --onto', with wrong results

Does git still behave expectedly? TIA!

-- 
Best Regards,
Eugeniu