"$" in User Input truncates PDF output.

Visforms Version 4.4.3
PHP 8.1.34
Joomla 4.4.10 

I have an Art Show Entry form which allows Users to enter a price for their works. If It set it to Type "Number", it works perfectly, ie "1234".
In testing, some users complained that they couldn't understand why it wouldn't accept the price if they entered "$1234". It's not used for calculation, so I changed the Type to "Text".
The result is sent back to the User as plain text and a PDF document (The PDF function is brilliant, thank you!!)
The text result is correct, but the PDF truncates the first two digits. For example:

User entry: $1234
Email text result: $1234
PDF result: 34
The placeholder in the PDF layout is ${entry1-price}

I've also tested this with other text fields - the problem seems to be "$" followed by a number. For instance:
Input "$Name"  returns "$Name"
Input "$4Name" returns "Name"
Input "Nam$45e" returns "Name"
"This is a $45Test$55Again" returns "This is a TestAgain"

They are all stored correctly in the database and in the result email. It's only the PDF copy that is missing characters.

I wonder if the output is seeing the '$" as an Escape character - an instruction rather than a letter?
Not a big deal, but it means that if the User has "$" as part of the title, the results are unpredictable.
Cheers

GG