Note to self. Don't say to neighbor jokingly that there's a dead body inside.

Not a good idea...

Sometimes it's better to not know what we keep deep down inside.

#HelloPolis @ Bukit Panjang, Singapore https://t.co/CyM3SjHiW3
West Region
[{'url': 'https://t.co/CyM3SjHiW3', 'expanded_url': 'https://www.instagram.com/p/CPklEE4AQpQ/?utm_medium=twitter', 'display_url': 'instagram.com/p/CPklEE4AQpQ/…', 'indices': [204, 227]}]
JELEBU
['note', 'self', 'say', 'neighbor', 'jokingly', "there's", 'dead', 'body', 'inside', 'good', 'idea', '...', 'sometimes', 'better', 'know', 'keep', 'deep', 'inside', '#hellopolis', 'bukit', 'panjang', 'singapore', 'https://t.co/cym3sjhiw3']
['good', 'neighbor', 'good', 'neighbor', 'good', 'neighbor', 'good', 'good']
note self neighbor jokingly that there dead body inside good idea sometimes better know what keep deep down inside #hellopolis
note self say neighbor jokingly dead body inside good idea sometimes better know keep deep inside hellopolis bukit panjang singapore
  [
    {"relatedness": False, "type": "none", "explanation": "This post is not related to maintenance report feedback for public flat houses."},
    ]

It seems that the Twitter post you provided does not relate to a maintenance report feedback for public flat houses in Singapore. The post mentions a "dead body" in a joking manner, which suggests that it is not a serious or factual comment. Therefore, the answer is that the post does not relate to a maintenance report feedback for public flat houses.