`SvelteDate` behaving weirdly (reactivity issue)

[felix-roehrich]

Describe the bug

SvelteDate is behaving weirdly, please see the REPL. I guess the underlying issue of the bugs is a reactivity issue and it might be the same for both bugs.

Reproduction

1. Expected behaviour: The current month/year is shown and clicking on next updates the month/year as expected. REPL
2. Bug 1: Click "next" once; the month updates as expected. Click "next" again and notice that the month stays the same. Also note that if you remove {d.getFullYear()}, the month updates as expected. REPL
3. Bug 2: Here reactivity works fine, but notice that the year is printed in the second line, even though it should only be the month. REPL

Logs

-

System Info

REPL

Severity

blocking an upgrade