? character being replaced with $1 after upgrading 4.0.7 --> 4.1.0

[njeirath]

Describe the bug
I recently upgraded from 4.0.7 to 4.1 and noticed some strange behavior when persisting values that contain a ? character. For some reason once the data is written to the database I'm seeing the ? replaced with $1.

Stack trace
On 4.0.7 when I save a string containing a ? I see the following query generated:

update "team" set "profilephotourl" = 'https://SOME_URL/profile.png?t=1602648800506' where "id" = '123'

And in the database it shows up as expected:

https://SOME_URL/profile.png?t=1602648800506

And on 4.1, I see the following query:

update "team" set "profilephotourl" = 'https://SOME_URL/profile.png?t=1602631580559' where "id" = '123'

But in the database I see:

https://SOME_URL/profile.png$1t=1602631580559

Where the ? appears to have been replaced with a $1

To Reproduce
Nothing has changed with the code other than to move from 4.0.7 --> 4.1 and the code itself in this case is super simple:

const team = await em.findOneOrFail(Team, {id: teamId})
team.profilePhotoUrl = url
await em.flush()

Where url contains the URL examples from above.

Versions

Dependency	Version
node	v14.5.0
typescript	3.8.3
mikro-orm	4.0.7 & 4.1
your-driver	postgresql

[B4nan]

fixed in 4.1.1