When biomes such as meadows are spawning, no flowers are spawned if there are players in the area being spawned(This situation is easy to occur when it is transmitted to the world that has not been loaded by.)

Your report does not contain enough information to understand or reproduce the problem.
Please add the following information to the Description, as shown here:

Steps to Reproduce:
1. (list every step carefully, so someone else can reproduce the issue, and try following your list to make sure you can still reproduce the issue yourself)
2.
3.
Observed Results:
(briefly describe what you see happen, including any message(s) shown)
Expected Results:
(briefly describe what should happen)

Be sure to include the world seed also.

Use screenshots or video to help explain (but not replace) the above information

This report has been temporarily resolved as Awaiting Response. It will automatically reopen when you add information. Please follow the format shown and include all sections (steps, observed, expected). Reports that do not contain all of the requested information and complete steps to reproduce the issue may be closed as Incomplete. For more information please read the Bug Tracker Guidelines.

Many players find this Bug Report Creation Form useful for filling in all helpful information.

This time, I sent the seed and related pictures.

Please pay attention to the distribution of dandelion in the last 8 pictures. There are fuzzy boundaries in the distribution of these flowers.

I opened this exact seed in singleplayer at first, to see if the flowers would generate then, but the terrain and foliage looked like on screenshots attached. This seems to me like as expected. Meadows are not to be fully flowered every time. Do you see a bigger patch of flowers somewhere near within the meadow? 
Can you attach other seeds where you reproduce, as an example?

This ticket will reopen automatically when you reply.