Rumour has it. @ Kallang, Singapore https://t.co/rG83CQYxKU
<a href="http://instagram.com" rel="nofollow">Instagram</a>
Central Region
[{'url': 'https://t.co/rG83CQYxKU', 'expanded_url': 'https://www.instagram.com/p/CDED7MghgmV/?igshid=t8kzlo09pd0j', 'display_url': 'instagram.com/p/CDED7MghgmV/…', 'indices': [36, 59]}]
KALLANG BAHRU
rumour kallang singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This is not related to public housing or maintenance issues."},
    ]

It seems that the Twitter post you provided does not relate to a maintenance report feedback to public flat house in Singapore. The term "rumour" suggests that the post may be referring to an unverified or unconfirmed piece of information, and the mention of "Kallang" and "Singapore" does not provide any specific context or details that would indicate a maintenance issue. Therefore, the answer is that the post does not relate to a maintenance report feedback to public flat house in Singapore.