V14 - Custom validation message doesn't display correctly

[elit0451]

Which Umbraco version are you using? (Please write the exact version, example: 10.1.0)

v14.1.0

Bug summary

Trying to save content with invalid property that has custom validation set, shows incorrectly formatted error under the property - #validation_invalidPattern. See the video for more details:

ValidationMsg.mov

Specifics

No response

Steps to reproduce

• Create a document type with a Textstring property;
• Set custom validation on that property - for example "Validate as an email address";
• Create a content node with that document type;
• Try to Publish with a value in that property that is not in an email format.

Expected result / actual result

Expected - in v13 we show "Value is invalid, it does not match the correct pattern".
Actual - #validation_invalidPattern.

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This item has been added to our backlog AB#42628