Minecraft: Beacon with Haste / Haste II is not working

Question

I have followed every step to make the beacon work, yet it still not working.

1. Build Beacon Pyramid (I did minimum in my single player world and a full on my realm)
2. Select Buff(s)
3. Add E/I/D/G payment
4. Activate

I am getting the buff icon and timer but it is not effecting my mining at all, its the same with and without the buff.

I have never used a haste beacon before, I got it in my realms world and it did not work then in 1.15.1 or now in 1.15.2. Yet I know it should work as I have seen the hermits in hermitcraft using it.

I did use a datapack with custom villager trades to get the beacon in my realm.

I used a wither skeleton head dropper datapack in my single player world.

Edit: Here are some screenshots:

I don't understand why it does not work. Unless its a bad file of something like that.

Answer 1

There is no difference between mining Efficiency V without Haste I and with Haste I for stone. For instant-mining it you need Efficiency V with Haste II.
There is a table for it on Minecraft Wiki

Answer 2

There is a gap in the speed of mining - if your block breaking speed would be shorter than 8 game ticks (0.4s) but higher than 1 game tick, it's set to 8 game ticks - therefore Efficiency V pickaxe + Haste I doesn't help against stone. It does though, against terracotta and basalt. Additionally, you can insta-mine stone with Haste I and Efficiency V gold pick.

You can watch the attached Ilmango's video for a thorough, in-depth analysis of the mechanics and overview mining speeds of various tools, including the upcoming Netherite.