hi,
when I found Aloe I seeded them. They seemed to vanish, but I "found" them a bit later in my backpack.
For the screenshot I put them in a chest and hovered with the mouse above them (but there is no difference between backpack and chest) I circeled the seeds red since the mouse isn't visible in the screenshot

Same problem with Aloe in my game.
Apparently the seedbag is in the upper left corner.
When leftclicking info on the invisible Aloe seedbag.
Items get turned invisible by accident
Your objects can turn invisible when you accidentally press the escape-button while holding an object (holding left-clicked) in your inventory. In my case, there will not be a text showing while hovering with your mouse over the invisible object. You have to know, that it is there, click on it and drag and drop it into another square in your inventory and it will turn visible again.
I happend to accidentally turn objects invisible (I thought I deleted them and got quite frustrated) and rediscovered them while I tried to pick up a lot of new items and got the message that my inventory was full. I opened my inventory and saw free space, which confused me, and clicked on it. Turns out there was my seemingly lost item, which turned invisible.
Somewhat happy endling
Thank you for that info amnidrenak, but for the Aloe seeds it seems to be different. It stays invisible no matter where I put it
Ah sorry! Yeah, Aloe-seeds will stay invisible in my game, too.
(But I wanted to mention the other "invisible-by-accident-items"-bug, too.)
Today I tried planting the invisible Aloe-seeds but nothing was happening.
Basically: Turning Aloe into seeds is just a way of loosing them.