Issue with subsection in latest head

[thmo]

This input

DESCRIPTION
  GENERAL
    Lorem ipsum dolor sit amet, consectetur
    adipiscing elit, sed do eiusmod tempor
    incididunt ut labore et dolore magna aliqua.

    Key  value

    AnotherKey  value2

is rendered in 1.7.1 nicely as

untitled(17 February 2022)                untitled(17 February 2022)

DESCRIPTION
   GENERAL
       Lorem  ipsum dolor sit amet, consectetur adipiscing elit, sed
       do eiusmod tempor incididunt ut labore et dolore  magna  ali‐
       qua.

       Key    value

       AnotherKey
              value2

                                          untitled(17 February 2022)

but in be89fb4 as

untitled(17 February 2022)                untitled(17 February 2022)

DESCRIPTION
       GENERAL  Lorem  ipsum  dolor sit amet, consectetur adipiscing
       elit, sed do eiusmod tempor incididunt ut  labore  et  dolore
       magna aliqua.

              Key    value

              AnotherKey
                     value2

                                          untitled(17 February 2022)

which doesn't look correct to me.