Template level "spread operator" missing type-information required for disambiguation of field names

I have a piece of code that works in 1.8, but throws errors on 1.9. It seems that let MyType{..} = var loses some type-information required for disambiguation of field names.

Here is a minimum example

module SpreadOperator where

data DataTypeOne = DataTypeOne with
  partyName : Party
    deriving (Eq, Show)

data DataTypeTwo = DataTypeTwo with
  partyName : Party
    deriving (Eq, Show)

template ImportTest with
    import_var: DataTypeOne
  where
    let DataTypeOne{..} = import_var
    signatory partyName

The error is:

~/tmp/myproject/daml/SpreadOperator.daml:15:15: error:
    Ambiguous occurrence 'partyName'
    It could refer to
       either the field 'partyName',
              defined at ~/tmp/myproject/daml/SpreadOperator.daml:8:3
           or the field 'partyName',
              defined at ~/tmp/myproject/daml/SpreadOperator.daml:4:3

I would expect that let DataTypeOne{..} = import_var has enough type information do disambiguate.

The issue persists in Daml Connect 1.10.

@garyverhaegen-da mentioned that there was a change to template-level bindings that might be causing it.

[garyverhaegen-da]

Note that the issue persists without the spread operator:

module Main where

data DataTypeOne = DataTypeOne with
  partyName : Party
    deriving (Eq, Show)

data DataTypeTwo = DataTypeTwo with
  partyName : Party
    deriving (Eq, Show)

template ImportTest with
    import_var: DataTypeOne
  where
    let DataTypeOne{partyName} = import_var
    signatory partyName

still fails with the same error.

[darko-da]

Definitely not urgent as one can easily not use that feature.