What may cause the GET variable not to be set?

The variable utm_source exists.
I'm passing it by calling url?utm_source=value
I've tried with an without a disconnected block that uses them.

I just realised that it is set for a brief moment, them it's set to empty.

I'm not setting it anywhere in the flow.

Hmm can't reproduce!

Try this bot: https://app.typebot.io/typebots/cls4g6mtd0003ojfqse06hsxr/edit

Done.

Let me isolate the problem.

Here:
First I ran with the flow connected to the first block and called url?utm=A
Then I ran with the flow connected to the second block and called url?utm=B
Results:

Looks like Typebot is erasing variables not deliberately used in the flow.
For now I'll add a script that does nothing, just access those variables.

Actually looks like the variable must be not just used, but read.
I say that because this variable was used, never read, and is also empty in the results page:

I just can't reproduce what you describe

Appreciate if you can provide a reproduction or even a video recording 🙏

I think your problem ins on Remember user

Hmm no I don't think so as it would overwrite the existing result

Can't reproduce it at app.typebot.io
Only at my own instance (that is juts 11 commits behind)
I'll update it.

An update didn't help.
Not sure that is happening.

An example:

In this case "caminho" must be "A" or "B", there's no other option.
Nevertheless, the result is empty.

To "solve" this I'm calling a script like this after each user iteration:

That's very strange! 🤔

I really don't know what's going on

Hey @Baptiste, I ran into this exact same issue. Oddly enough, this was working fine for me the last time I tested it on February 12th and there has been no changes to the typebot since before that date. But I was just doing some final testing as we are about to go live and sure enough, the UTM variable I'm using (hostname) is empty now. Using the script workaround provided here has resolved it for me. Of note, I removed the script workaround and it continued to work. Very strange.